Improvement in revolving ore-roasters



W. O. SLEEPER. Revolving Ore-Roaster.

N, PETERS. PHOTO-L YHQGRAPHER WASHINGTON D c UNITED lILa'IEs PATENTOEEIoE.

WILLIAM O. SLE'EIER, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN REVOLVING ORE-ROASTERS.

Specification forming part of Letters Patent No. 215,301, dated May 13,

1879 application filed April Is, 187s.

V idizin g and treating silver ores.

My invention relates to improvements in ore-furnaces; and consists,first, in the employment of a tilting and revolving cylinder forroasting ores, connected with fire-chambers, and supported upon a frameprovided with wheels, made to traverse oppositely-inclined planes in abed-plate, whereby a tilting movement is given the cylinder.

My invention further consists in supporting the ore-cylinder on hollowrollers part-ly filled with water, and journaled in a reciprocatingframe, whereby the hollow rollers containing water perform the functionsof friction-rolls for the cylindeiyand also prevent heating.

My invention also consists in the construction of the ore-cylinder withanged guiderings, which rest on the hollow rollers of the frame, atoothed central ring, and curved longitudinal slats.

My invention also consists in the employment of hollow standards in thefire-chambers, provided with orifices near their upper ends, for thesupport of a water-bridge pipe, and the passage of steam and air throughperforated pipes attached to the water-bridge pipev into the orescontained in the cylinder.

Figure 1 is a vertical longitudinal section of my improved ore-furnace.-Fig. 2 is a plan view ofthe same; and Fig. 3 is an end elevation.

Similar letters indicate like parts in all the figures.

In the accompanying drawings, a, is the base-plate or support of myimproved furnace, provided with a central recess, b, (see Fig. 1,)having oppositely-inclined planes c e. g is a rectangular frame,provided with the four corner posts, h, having slots in their upperends, in which are journaled the hollow rollers n n, partly filled withwater, to prevent their heating. T are rollers, journaled in cross-beamsconnecting the end posts It, said' rollers being also hollow and partlyfilled with water, to prevent heating. q q are cross-ties connecting thelongitudinal sides of the frame g. o is a screw-shaft, having itsbearings in the crossties q q, and provided at one end with a pinion, m,which meshes with a pinion, r, on lthe cross-shaft al, having itsbearings in the longitudinal sides of the frame. and provided at itsouter end with the pinion t. p is a block, provided at its end withupright ears, having screw-threaded perforations, through which thescrew-threaded shaft o passes. z are axles, on the outer end of whichare sleeves turning loosely 011 said axles, which latter are providedwith wheels o o. w w are hounds attached to the axles, and pivotallyconnected with the block p. a2 is a transverse shaft, journaled in earsin the frame g. The axle a2 'is provided with a central worm, s, andend` pinion u.

O represents a hollow cylinder, resting on the wheels T, and supported`laterally by the wheels n n. The cylinder O is provided near its endswith hanged rings K', which receive the rollers or wheels T fn, n, andguide the cylinder in its revolution. A is a toothed ring surroundingthe cylinder O and gearing with the worm s. The ends of the cylinder Oopen into the chamber J, connected with the smokestack,- and into thenre-chamber P, where the ore in the cylinder is discharged through theopening Y in the lower part of the fire-box', provided with a door.

K K represent curved metallic slats extending lengthwise of thecylinder, and preferably made fire-proof, which raise the ore as thecylinder revolves. U represents the feed-hopper, provided at its lowerend witha bent tube, 0', leading into the cylinder O. U is a door in theside of the cylinder. L L represent sliding plates, provided with orices for the reception of the ends of the cylinder O. These platesslide up and down in grooves as the cylinder is tilted to close theopenings in the walls.

Power being applied to the shaft al, the frame g is moved forward, thewheels o o on one side passing up the inclined plane on one side, andthe opposite set of wheels c 'v passing down the opposite inclinedplane, the frictionA sleeves on the ends of the axles resting andrevolving on side strips attached to the inclined planes.

By this construction the cylinder may be adjusted to any inclination tofacilitate the working and discharge ofthe ore.

Power applied to the shaft a2 to rotate it will cause, through the worms gearing into the toothed ring A', a revolution of the cylinder O.

M M are hollowr iron standards situated in .the chambers J l?, andprovided near their upper ends with orifices, for the support of thewater-brid ge pipe c3, and the passage of steam and air through theperforated pipes C F into the cylinder.

The perforated steam and air pipes are banded to the water bridge pipea3, which supports them, and a current of water is forced through one ofthe pipes Dvinto the bridgepipe a3 to prevent it from heating, and afterpassing through the bridge-pipe is discharged through the other pipe D,both the feed and discharge pipes D passing through the hollowrstandards M, and connecting with the waterbridge pipe a3.

E is a pipe for conveying air to the blower F', and thence through apipe in the standard M into the perforated pipe F" in the cylinder.

If cold air is desired, the hot air in the pipe E is shut off, and coldair is admitted through the blower.

The fire-chamber is lined with steam-superheaters; or the exhaust-steamfrom the engine may be conveyed by a tortuous pipe, O, up

- through the hollow standards M, and then ce to the perforated pipe c,attached thereto, and mingled with the ore.

The perforations in the pipe are all on the under side, and the pipesare coated with a nre-proof material.

S is the escape-steam pipe, that leads from the end ofthe superheater incase the steam is not wanted in the cylinder.

` I claim as new and of my inventionl. The base a, provided with arecess, b, having oppositely-inclined vplanes e, in combination with theframe g, screw-shaft o, block p, hounds w, axles z, and wheels u,substantially as described, and for the purpose set forth.

2. The frame g, provided with the hollow rollers n T, partly filled withwater, and transverse worm-shaft a2, in combination with the cylinder O,provided with the ianged rings K', toothed ring A', and curved slats K,substantially as and for the purpose set forth.

3. rIhe frame g, provided with the hollow rollers n T, partly lled withwater, in combination with the revolving cylinder O, substantially asdescribed, and for the purpose set forth.

4. The hollow standards MM, having orifices near their upper ends, incolnbination with the pipes c F a3 and cylinder O, substantially asdescribed, and for the purpose set forth.

5. The cylinder O, provided with the flan ged rings K', toothed ringA',and curved slats K, in combination with the pipes c F d3, passinglongitudinally through the cylinder, substantially as described, and forthe purpose set forth.

WILLIAM OSGOOD SLEEPER.

Witnesses:

TRUE PAGE SLEEPER, CHARLES SnEEPER.

